I am looking for the OEM lengths for an 1988 XJ driveshaft. (both front and rear) I am thinking of swapping out my 242 t-case and putting in a 231. The Jeep is a 4spd auto, I'm not sure of the axles, but I think that they are Dana 30's??? they are not disco type. I was told by one person that I would have to get new shafts, then another told me that the ones I had would suffice....

The axles are not Dana 30s. The front is, but the rear will be either a Dana 35 (most likely) or a Dana 44 (not very likely). The D44 has a longer pionion and takes a correspondingly shorter driveshaft.

I'm currently working on an '88 with Dana 35 axle and 242 transfer case. I'll try to remember to measure the rear shaft length for you when I'm in the garage tomorrow.

BTW -- check the North Atlantic Chapter forum, we're planning a get-together in Maine. Hope to see you there.

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Eagle - Lifetime Member

Owner/Driver/Enabler of "The Fleet"Self-appointed President-for-Life of the World MJ Preservation Society

Well, my 88 currently has the 242. The reason that I want to replace it is because it's cracked. I just happen to have a 231 sitting in my shed. I do disagree however on the case length. I think that the 231 is .150 thousands (about 5/32nds) longer. But, I could be wrong....

Originally posted by dgmachinist Well, my 88 currently has the 242. The reason that I want to replace it is because it's cracked. I just happen to have a 231 sitting in my shed. I do disagree however on the case length. I think that the 231 is .150 thousands (about 5/32nds) longer. But, I could be wrong....

Seth

there no SIGNIFICANT difference that would necessitate a change in driveshaft length.